If you want to escape the tourist traps in Salem (souvenir stores, restaurants etc.), I HIGHLY RECOMMEND this very well-informed tour! Jeff, the owner of the company, is the one who gives the tours & is incredibly knowledgeable about the history of what happened in Salem at the time (& the things we don't know since there is not a clear written record, he doesn't pretend to know).
The history of the witchcraft accusations, trials, and hangings of real people & what really happened in Salem is so much more interesting than some cheesy ghost tour etc. Jeff brings the stories of individuals & the context to life & adds in some intelligent sarcasm along the way.
FOR WHERE TO MEET, this seems quite confusing (Houdini Way is not labeled). It is more like 15 Front St., just FYI to help navigate.